GasWatch 3 for CO and O
2
Chapter 3: Measuring Mode • 19
4. If
Password Protection
is turned
On
(factory setting is
Off
) using the GW-3 Setup
Program, a user-set password is required to turn off the GasWatch 3. When the password
screen appears, adjust each digit with the AIR button and press and release the POWER/
MODE button to move on to the next digit. Once the password is entered, the instrument
shuts off.
Measuring Mode Operation
When the GasWatch 3 completes its startup sequence, it is in Measuring Mode. In Measuring
Mode the GasWatch 3 continuously monitors the sampled atmosphere and displays the gas
concentration. The GasWatch 3 is in Normal Operation if there are no alarm indications.
Heart Symbol: The heart symbol on the right side of the LCD indicates the operation status
and flashes when normal. A microprocessor error causes the heart symbol to stop flashing or
to disappear.
Check Mark: If
BP.RMDR
is set to
ON
and if a bump test is not due, a check mark appears in
the lower left corner of the LCD.
“S”: If the instrument is operating in Stealth Mode, an “S.” appears at the bottom of the LCD.
Backlight: In a low-light environment, press and release either button to turn on the display
backlight. See pg.67 to program backlight duration.
Confirmation/Non-Compliance Indicator: If the
BEEP
item in User Mode is set to anything
other than
OFF
, the GasWatch 3 gives periodic indications to confirm that it’s operating or to
indicate a non-compliance (see pg.66).
Monitoring an Area
1. Start up the GasWatch 3 as described above in “Start Up” on page 14. It is now in
Measuring Mode.
2. Take the GasWatch 3 to the monitoring area.
3. Wait at least 15 seconds.
PASS--W
0 0 0 0
S. 10:42
20.9
%
0
ppm
10:42
20.9
%
0
ppm
